Does anyone have a better word than "mark up"?

One of my clients (who is not used to working with recruitment/staffing companies) cannot stand the word "mark up".

When we charge a "45% mark up on temporary staff", sometimes the clients mistakenly believe that we are earning 45% gross margin (no matter how many times we explain that there are many other costs which we bear in our mark up, not including taking on the burden of the risk of accident).

Would this work? "Our "fully loaded" cost to you is $XXX", the idea being that the final price the client paid is "loaded" with the on costs, which include all the statutory costs associated with making that hire